Feed-water regulator for boilers.



No. 683,l48. Patented Sept. 24, l90l.

B. SCHULZ.

FEED WATER REGULATOR FOR BOILERS.

(Application filed May 3, 1900.)

(No Model.)

'rrnn SATES PATENT FFIQEE.

RICHARD SGI-IULZ, OF BERLIN, GERMANY.

FEED-WATER REGULATOR FO'R BOILERS.

SFECIFIGATION forming part of Letters PatentNo. 683,148, dated September24, 190 1.

Application filed May 3, 1900.

To all whom it may concern.-

Be it known that I, RICHARD SOHULZ, a subject of the King of Prussia,residing at Berlin, Germany, have invented certain new and usefulImprovements in Feed-Water Regulators for Boilers; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to letters of reference marked thereon, whichform a part of this specification.

This invention has relation to appliances for controlling the supply ofwater to steamboilers; and it has for its object the provision of simplemeans whereby the supply of water to a steam-boiler may be readilycontrolled and the controlling appliances rendered inoper-ative undercertain conditions or whenever this becomes desirable or necessary; butthat my invention may be fully understood I will describe the same indetail, reference being had to the accompanying drawings,in which-Figures 1, 2, and 3 are longitudinal sectional views of the feed-waterregulator, showing the regulating-valves in different positions. Figs.4, 5, and 6 are end views showing the adj Listing-lever in the positionscorresponding with the respective positions of the valve-spindle inFigs. 1, 2, and 3. Fig. 7 is a sectional view of a steam-boiler havingthe feed-water regulator applied thereto, and Fig. 8 is a cross-sectionon line a; it of Fig. 1.

The regulator comprises a valve-casing at, having an internalwater-distributing chamber a, into which opens the supply branch Z, saidchamber having in each of its opposite walls in the axial line of thecasing an inlet port controlled by valves 12 b on a valve-spindle h. Oneend of this spindle his screw-threaded and screwed into a sleeve 0,provided with a perforated lug 0, adapted to be connected bya rod d to alever pivoted on a standard in the boiler B, to which lever thefloat-rod cl is secured in a well-known manner. The sleeve 0 has astop-flange g, abutting against a circular abutment in the casing a, towhich the sleeve 0 is keyed or feathered, so as to prevent its rotationin its bearin g f without interferin g with its longitudinal or endwisemovements. The casing a has a flange a ,by.means Serial No. 15,889. (Nomodel.)

spindle is by means of a key or pin passing through a longitudinal slot70 in said spindle 70, so that when the latter is revolved thevalvespindle will also be revolved and screwed into or out of its sleeve0, according to the direction of rotation of spindle 7c,which latter isprevented from partaking of the longitudinal motion of the valve-spindleh. The spindle 70 has its bearings in suitable stuffing-boxes and projects from the casing a, the outer end of the spindle being atten uatedand screw-threaded, as shown at 70 and on said attenuated end of thespindle is mounted a hand-lever 1', provided with a pointer i, travelingover a scale '5 on the outer face of casing a. The lever t' is or may bean integral part of a sleeve .9, fitted in a suitable bearing at theouter end of a casing a, the interior of the sleeve 3 being of polygonalform in cross-section and fitting a corresponding portion k on spindleis, and on the attenuated threaded portion 10 of said spindle works alock-nut 70 provided with a handle 70 for locking the spindle k' againstrotation when revolved for adjustment of valve-spindle h. In practice toafford access to all parts of the regulatorI prefer to construct thecasing in sectionsnamely, of a body part a, having the flange a at oneend and a flange a at the opposite'end, the branch a screwed orotherwise secured to said body part, the head-plate a provided with arecess or stuffing-box for the gland 0 and screwed into said body parta, and the outer part a, bolted to the head-plate a and having at itsouter end the scale-face 2' and a bearing a for the sleeve 8, so thatthe regulatorcan be readily dismembered. Although I prefer to bolt orotherwise secure the regulator-casing to the boiler, as described andshown, it is obvious that the casing may be located outside of or whollywithin the boiler.

loo

longer these connections the higher will the j float be held, and hencethe higher will be the water-leveLthe float being prevented from risingbeyond its adjusted position by the stopflange g and the abutment aboutthe bearing for the sleeve 0, while the drop of the float is limited bythe length of the slot k in the adjusting-spindle. In other words, byvarying the length of the connections between the valve-spindle and thefloat-actuating lever the angular relation of the float-rod relativelyto the valve-spindle and connecting-rod is correspondingly varied. Whenthe connection between the valve-spindle 7t and connecting-rod d isshortest-that is to say, when said spindle is fully screwed into itssleeve cthe rods d d are substantially parallel and the float e will beheld in its lowermost position, corresponding, therefore, to the lowestwater-level in the boiler, the pointer i of levcr t' on scale 2' beingthen on the first graduation on the left of the scale '5 Fig. 4, thespindle It being free to reciprocate as the float e falls and rises byreason of the pin-and-slot connection of the valve-spindle with theadjusting-spindle 70, thereby opening or closing so the scale, Fig. 5,the said valve-spindle It will be partly screwed out of its sleeve 0,Fig. 2,

lengthening to that extent the connection be- I claim as new therein,and desire to secure by 1 Letters Patent, is-

tween such spindle and the connecting-rod d, thereby raisingv the floate to a correspond- 3 5 ingly higher level, the valve-spindle stillhaving sufficient longitudinal motion to move the valves 7) and b to andfrom their seats, this being the case in whatever position the lever imay be moved, except when moved to .0, its extreme position to the left,Figs. 3; and

6, the pointer being then on the last graduation of said scale on theright. When the lever 2' is moved to the position last referred to, thevalve-spindle it will have been screwed out of its sleeve 0 to such anextent as to bring the key or pin 70, that connects said spindle withthe adjusting-spindle 70, to the outer end of its slot 70 with theflange g of the sleeve bearing on its abutment and locking thevalvespindle against motion, with both valves off their seats, as shownin Fig. 8. Obviously the flange 9 determines the position of the floatin the boiler and prevents said float from rising beyond the position towhich it is adjusted, and obviously the height of the water-level in theboiler may by the means described be varied from a minimum to a maximumlevel, dependent upon the extent to which the length of the connectionbetween the spindle and connecting-rod cl can be increased from aminimum length. The length of the slot k in the spindle 7c is equal totwice the throw of the valve-spindle, said spindle having twice therequired throw when in its relation with the sleeve 0, as shown in Fig.l,

the amplitude of the throw of the spindle being gradually reduced as itis screwed out of said sleeve and is nil when screwed out to the fullextent, in which position the valves 1) and b, as above stated, are heldoff their seats, the regulator being thrown out of operation by themeans which control the height of the water-level in the boiler. Such anarrangement is if not absolutely necessary yet very desirable, as itaflords means for feeding the boiler in the ordinary manner, which isgenerally required of reliable boilers. Although I have shown thefeed-water-distributing chamber a as provided with two distributing oroutlet ports, it is obvious that but one may be used.

From the. description of the construction and operation of thefeed-water regulator it will be readily seen that the supply of water ito the boiler is not regulated as usual by increasing or decreasing thevolume flowing to the boiler, such increase or decrease being determinedby the throw of the valve, which latter is determined by the amplitudeof the rising and falling movements of a float. In my said feed-waterregulator the volume of water flowing to the boiler is always the samewhatever the throw of the valve or the amplitude of the rising andfalling movements of the float may be, the supply being regulated solelyby an absolute cut-off determined by the amplitude of the movements ofthe valve and float.

Having thus described my invention, what 1. A feed water regulator,comprising a valve-casing having a feed branch and afeedwater-distributing chamber having ports in its opposite walls, avalve for each of said ports, a valve-spindle common to both valves land having endwise motion in the valve-oasing, an internally-threadedsleeve into which said spindle is screwed, said sleeve held againstrotation but moving endwise with the spindle, and means for revolvingthe spindle without interfering with its endwise movement, whereby saidspindle may be- I screwed more or less into or out of said sleeve ,1

in combination with a float-reciprocated rod connected with the sleeve,substantially as and for the purpose set forth.

2. A feed-water regulator, comprising a rrg valve-casing having a feedbranch,and a feedwater-distributing chamber having ports in its oppositewalls, a valve for each of said ports, a valve-spindle common to bothvalves and having endwise motion in the valve-ens ing, aninternally-threaded sleeve into which said spindle is screwed, saidsleeve held against rotation but moving endwise with the spindle, meansfor revolving the spindle without interfering with its endwise movementwhereby said spindle may be screwed more or less into or out of saidsleeve, and means limiting the movements of the spindle in eitherdirection; in combination with a float-reciprocated rod connected withthe sleeve, sub stantially as and for the purpose set forth.

seams 3 3. The combination with the valve-spindle h, the valve-casingand the sleeveo into which the spindle is screwed,said sleeve heldagainst rotation but having endwise motion in the casing, and saidspindle provided with a slot k of the spindle kconneoted with thevalvespindle by a pin passing through the aforesaid slot, and means forrevolving the spindle 70, substantially as and forthe purpose set forth.

4. The combination with the valve-casing a having a graduated index onits outer face, the valve-spindle h having rotary and endwise motion insaid casing and provided with an elongated slot 70 and the sleeve 0screwed to the valve-spindle and having a perforated lug, said sleeveheld against rotation in its RICHARD SOHULZ.

Witnesses: I

MAS. O. STAEHLER, HENRY HASPER.

